Piercing-mill and the like.



s. E. DIESCHER.

- PIERGING MILL AND THE LIKE.

APPLICATION FILED JUNE 20, 1906. 999,757. Patented Aug. 8, 1911,

Z SHEETB-EHBEE 1.

Witness 5% a citizen of the United SAMUEL E. DIESCHER, OF PITTSBURG, PENNSYLVANIA.

' IERCING-MILL AND THE LIKE.

To all whom it may concern: 7

Be it known that I, SAMUEL E. Dmsormn, States, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Improvements in] Piercing-lilills and the Like, of which the following is a specification.

My invention relates to piercin mills for manufacturing seamless tubes f rom solid blanks or billets, but may be used for straightening or other rolling operations.

In the customary practice of making tubes by the combined action of rolls and a piercing mandrel, the friction between the rolls and tubes has been very great, requiring a waste of power and'rapid wear and strain of the apparatus. y my invention, I aim to do away with the friction between the rolls and the work, whether the same be a. billet, a tube, or a bar.

My invention is disclosed in the three accompanying sheets of drawings, in which Figure l is a longitudinal section thereof; Fig. a vertical section thereof on the line 2-2 of Fig. 1.. looking with the arrows, the rolls with their frames and driving chains and wheels being shown in elevation; Fig. 3, an end elevation of one of the rolls d its shaft; Fig. 4, a cross-section of one of the rolls on the line of the center of its shaft, the latter being shown in side elevation: and Fig. a plan view of aform of tongs which I may use, one of the hooks being partly broken away. 1

Referring to the drawings, 1 is the stationary base or frame, which supports the movable portions of my invention. Sn- ,ported horizontally in said frame is he shaft 2 provided with the driving pulley 3 and the roll-carrying head 4. Movable radially toward and from each otherv in the head are the pistonsfi operating in the cylinders 6 which have their outer ends beyond the pistons connected by the tubes or passages 7 in the head, shaft and pulley. The outeeead bf the pulley has the block 8 secured theretb, which contains continuations 9 of the tubes or passages 7 ending in the annular grooves 10 in the stationary ring 11. 12 is a pipe which leads fluid pres sure to the groove 10. The pistons 5 have inward prolongation consisting of the racks 13 meshing with the pinions 14 secured to the screws 15 which are parallel and on 0p posite sides of the liter of the shaft 2.

Specification 01' Letters Patent.

Application filed June 20, 1906. serial No. 322,581

of the shaft ,ed together in pairs by the sprocket chains 20.

Patented Aug. 8, 1911.

The ends of the screws are o osite: y threaded and cooperate with the'two slidin frames 16, each carr ing a roll 17 on a she t 18, the rolls being isposed at right angles to the screws and on op osite sides of the center of the shaft 2. ach screw has a pair of sprocket wheels 19, one on each side plane including the center of the 2. The sprocket wheels are connect- The rolls are not rigidly secured to the shafts 19, but have a wabbliug motion, which may be rovided for in various ways. I have shown t e shaft 19 with a. bulge, ball or barrel-shaped center 21 with the collar 22 at each end of the bulge, the collar having the inclined shoulders 23 to be engaged by corresponding shoulders 24 at the outer ends of the opening through the roll. This opening conforms to the shape of the col-' lars and the bulge so that the roll can swing at an angle to the shaft 19, as shown by dotted lines on Fig. 4 and may maintain the angle durin the rolling o eration of the machine. T e collars ma e modified or omittetl entirely, if desire Each roll preferably consists of an outer integral annular part 25 and an inner annular sectional part consisting of thehalf rings 26 held from rotation within the part 25 by means of the rivets 27 lying each ring and from separation by the rivets being headed down over both rings, as shown in Fig. 4. The roll and shaft ma be otherwise constructed but I would consider my invention to. covter any method of connecting the two whpreby the principle of their operation is use-d.

At the front of the frame 1, I secure a table 28 carrying a pair of endless sprocket chains 27 (only one being shown). Mov able over this table is a pair of tongs which I prefer to construct as shown on Figs. 1 and 5, though other forms of tongs may be devised without departing from my invention. The tongs shown have the two jaws 30 secured together by the large pivot- 31. The reins 32 of the tongs form bell-cranks with their respective jaws and are connected by the links 33 to the-cross-head or block 34 through the horizontal pins or pivots 35' on which the block may swing up and down. The block is provided with rearward extensions or books 36 for engagement with the links of the chains. The block is provided with a handle 37. The pivot 31 and the half in block 34. have rm opening in line with the axis of the shaft 2, in which opening is the has an inclined chute portion 4/3 to guice the bars to be pierced into the tub'tO."

44 designates aJbiIlet r her being pierced. The operation is as ollowsr+f he billet 44 is first heated. and pushed into thetuhe 40 and between the rolls 1'? whereit en 'ages the mandrel head, 39. The shaft 2 elng thrown iiito operatliouggthe billet is pushed past the rolls and graSptacl'hy the twinge, As soon as the tom s have the'irjaws Over the ma, of um bit/t the hooks 36 by r raising thehandle 37, engaged with; the chains 29 whic gh are traveli'ng coustentl'y in the direction. of t ehrrow new the chain 29.

The first action of theehnjns' is to closeithe jetvs lo'f theftongs njm 1 pipe uiid lift the chain's towel-ell, 'T'miifi'glifelu Then the chains pull the billetthi oiigh the rolls and over the mandfel' 'in o' manner" reluiily understood. When the billetllms passed he,

yond the rollsfthe hooks willb, disengage-l from the chains by the gtnvity'oi the chflliIS and the over-balance of the block 34, and the nmnclre-l and tongs drawnawoy, from the tube, It will be observed that us the {ripe is pushed or drawn past the1ol] 5,the

utter will have the partsthereof iii oontu'ot with the 'billet rocked or swung foifwairclin the rlireetion of the travel of thefbilletzi Where the rolls aireitflg'iggdjly at rigiitim has to their-shafts, thebillt: as enbiundusi i'iction against thefrol1s,.,as"the uuur clo not hwistthe billet; aiwhei'eqthe rollsllt'e freely mounted so astdswingweS" desribed, the draft required ie e th' billets; is meterially lessened, ,iheegugeeheih Tillrtibii of the rolls asjheyengifiethe'hi letignpve em a point at the rear of the point-iihere f just passing thebillet and swin fo wdrd with the movementpf the billetw tholjlflan frietion orwith' it negligihiefqeuntity ereof. This forward swingojthe rblls'is continuous while theinihczhi in; 6 "rd tibn. In operation 'theibl forward at a laige a may he very small iv o 4 rolls is "very rapid, because it, i tion the rolls will swing. So as toflpefinihthe billet to feed fOI'WBrd' 1 V1tl'l0l1t fi'it'tioh a distance equal to therqmountwhich the point in contact with theliillet is in advunee or' the diametrically opposite point. if the revolutions are'very many per second, the billet may pass very rapidly without movand I do. not detiitegte' be restricted: to the precise z neeh'unisunl diselo'seclr If, (i; eh m- ",sti'ict the uaebti I'll oils drtheipgi uiva lent to pierfih :fhi I',-l1u;tf claim protection usefuh By niereli omitting the mandrel, the machine could eusd' f ustraighthj g,

shown might u use 111- Fflajfihinefdifigie ently organii'ml. v'Ilili ttitlgly ted and the billet, into and t-hrmigh tl' ej'ollsefllhenumbe e of rolls may he'inege ,iifdesire'cl. l Having dee'ciii inventioyufldlaiuii- 1 In e tollin! ing rolls nrrangecl rzhhetwoen them-n pass fo fi liiheping'th (tress-suction of'metal. one of sniditolls heinglmounted to have fi ee i'ookinginouement transversesof its axis.

a shaft; in one of the tolls, and'a' universal said connection being'eonsfiuted to permit free rocking movement of the IOILZWTOOITQ- the pass.

ea 11 of the said rolls'heing m'otuited to: fnee universul movementto eor respond the-travel of the work the- 4:. In a tollinginill, a plurality ofshn ing rolls urmngedlto foymhetween than pass for shaping the c'rhhs section of-metal; .ejslmftsu'pportingeach roll, and a ball and on saidlconneetionw r V v t 5. In a rolling miller the like, n w head, a flu dity of tolls carried by said head an arranged toformn pass.,n plu- -otury herul themon carrying-a plurality of "rolls loving a pass between them, Pistons l and oyliuders in said head, said pistons be ing n'nmmctutl one to each roll and being arii plurality ofghup;

spend withthe tmiilof the work th' rough 3. In a; rolling. mill a pln 'gilityi of ing rolls arranged to form between pn ss fox-shaping the cross-section of me ,1

rality of pietjona connected one *tdeaoli hall I and arrongert when actuated to'urgejfzthe' rolls toward-the saidpnss, andmeans i10 m pplying pressure eim'ulteneoiiely. to all the pistons to set up a tendency of the rollite move simultaneously towarrl said pqssfi" 6. 111 a rolling mill or" the like, a hnfh tll on the snmeiwg er'ever thoyiprove themgeluhsi 2. In atoning mill, a phn'e'lity .of shop-p ing rolls armngal to form between them a. piles: for shaping the cross-section of metal,

socket connectio1vbetween one of the rolls:

and its shaft, said rollrbeing freely movable 15 i'angell when actuated to urge the M112 tono a rotary head, a plurality of rolls carried thereby,

slidable roll-carrying frames in the head,

right and left hand screws connecting the frames, and means for rotatin the screws. 8. In a rolling mill or the like, a rotary head, a plurality of rolls carried thereby, slidable roll-carrying frames in the head, right and left hand screws connecting the frames, pinions carried by said screws and means engaging the pinions for rotating the same. a

9. In a rolling mill or the like, a rotary head,-.a plurality of rolls carried thereby, slidable" roll-carrying frames in the head, right and left hand screws connecting the frames, pinions carried by said screws, racks meshing with said pinionsyand means. for inovin the racks. r" V 10, n a rolling mill or the like, a rotary head a. plurality of rolls carried thereby, slidahle roll-carrying frames in the head,

right and left hand screws connecting the frames, pinions carried by said screws, racks meshing with said pinions, independent 80 means for moving the racks, and means for causin the rolls to be adjusted equally.

11. n a rolling mill-or the lik a rotary head a plurality of rolls carri them, slidahle roll-carrying frames in the h 15 right and left hand screws connecting the frames, pinions carried by said screws, racks meshing with said pinions, independent means for moving the racks and a sprocket chain connection between t e screws. 40

12. In a rolling mill, a plurality of rolls arranged to form a pass, a shaft extending throu h each roll and a universal connection Eetween' each roll and its res 've shaft the periphery of each roll bemg curved from face to face on the arc hf a circle drawn from the center thereof.

Si ed at Pittsburg this18th day of June, A. 1906. q

SAMUEIL E. DIESCHER.

Witnesses:

F. N. Burns, 0. E; Eccnns. 

